Data/hora: 02/06/2024 11:47:16

Provedor de dados: 	5	
País: 	France	
Título: 	Effects of blue light on the biochemical composition and photosynthetic activity of Isochrysis sp. (T-iso)	
Autores: 	Marchetti, Julie; Bougaran, Gael; Jauffrais, Thierry; Lefebvre, Sebastien; Rouxel, Catherine; Saint-jean, Bruno; Lukomska, Ewa; Robert, Rene; Cadoret, Jean-paul.	
Data: 	2013-02	
Ano: 	2013	
Palavras-chave: 	Isochrysis; Blue light; Photosynthesis; Proximate composition; Chemostat.	
Resumo: 	In aquaculture, particularly in bivalve hatcheries, the biochemical composition of algal diets has a strong influence on larval and post-larval development. Biochemical composition is known to be related to culture conditions, among which light represents a major source of variation. The effects of blue light on biochemical composition and photosynthetic rate of Isochrysis sp. (T-iso) CCAP 927/14 were assessed in chemostat at a single irradiance (300 μmol photons m−2 s−1) and compared with white light. Two different dilution (renewal) rates were also tested: 0.7 and 0.2 d−1. Relative carbohydrate content was lower under blue light than under white light at both dilution rates, whereas chlorophyll a and photosynthesis activity were higher. In contrast, carbon quota was lower and protein content higher under blue light than under white light, but only at 0.7 d−1. Despite these metabolic differences, cell productivity was not significantly affected by the spectrum. However, the nitrogen to carbon ratio and photosynthetic activity were higher at 0.7 d−1 than at 0.2 d−1, while carbon quota and carbohydrate content were lower. Our results show that blue light may influence microalgal metabolism without reducing productivity for a given growth rate, a result that should be of great interest for microalgal production in aquaculture.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00085/19599/17237.pdf

DOI:10.1007/s10811-012-9844-y	
Editor: 	Springer	
Relação: 	http://archimer.ifremer.fr/doc/00085/19599/	
Formato: 	application/pdf	
Fonte: 	Journal of Applied Phycology (0921-8971) (Springer), 2013-02 , Vol. 25 , P. 109-119	
Fonte: 	Springer Science+Business Media B.V. 2012